keyna bombing...interesting facts... the attack of Jamia Mosque (the symbol of Islam in Nairobi)
mistreatment of Al-Faisal at the hands of the Kenyan authorities who had a lot of support
Al Qaida (and Muslims alike) may interpret his nabbing in Kenya as the product of American/British influence thus the need to teach the Kenyan government a lesson one more time
and also they perceive Kenya government to be puppets to the American/British governments
During the Al Faisal demo in Nairobi, reports indicated that five Muslims were shot dead by police. According to a statement released through revolutionmuslim.com (which has posted the first interview with Al Faisal since his arrival in Jamaica) the prayer of Al Qaida is that Allah bestow upon the slain Kenyan Muslims the honor of martyrs. Be that as it may, Al Qaida will, most likely, want to revenge their deaths and there is no better way of doing so than exploding a huge car bomb at Nairobi’s Central Business District to kill as many Kenyans as possible or sending a suicide bomber to blast one of the five star hotels to kill “Kafirs".
also in why muslim extremists hate america
(1) the U.S. government’s ardent support of Saddam Hussein and the furnishing of biological and chemical weapons of mass destruction to him; (2) the more than 10 years of brutal sanctions against Iraq, which contributed to the deaths of hundreds of thousands of Iraqi children; (3) UN Ambassador Madeleine Albright’s infamous statement to Sixty Minutes that the deaths of half a million Iraqi children from the sanctions had been “worth it”; (4) the stationing of U.S. troops on Islamic holy lands, knowing the adverse impact such action would have on Muslims; (5) the “no-fly zones,” which were never authorized by either the UN or the U.S. Congress and which killed still more Iraqis, including 13-year-old Omran Harbi Jawair, whose head was shot off by a U.S. missile while he was tending his sheep in 2000; (6) and the long-time, unconditional financial and military aid provided the Israeli government.
oh and i found this on wikipedia on osama bin ladens motivation and theres others
http://en.wikipedia.org/wiki/Beliefs_and_ideology_of_Osama_bin_Laden"First, for over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbors, and turning its bases in the Peninsula into a spearhead through which to fight the neighboring Muslim peoples.
If some people have in the past argued about the fact of the occupation, all the people of the Peninsula have now acknowledged it. The best proof of this is the Americans' continuing aggression against the Iraqi people using the Peninsula as a staging post, even though all its rulers are against their territories being used to that end, but they are helpless."
if you scroll down it has osama bin ladens transcript on a fatwah against americans and the reasons why
http://www.mideastweb.org/osamabinladen1.htmand theres probably others too but it would take quite a while to research them